Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2006-02-21
2006-02-21
Singh, Sunil (Department: 3673)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S428000
Reexamination Certificate
active
07000715
ABSTRACT:
A superabrasive cutter-equipped rotary drag bit especially suitable for directional drilling in subterranean formations is provided. The bit may employ PDC cutters in an engineered cutter placement profile exhibiting optimal aggressiveness in relation to where the cutters are positioned along the profile of the bit extending from a cone region laterally, or radially, outward toward a gage region therefore. The engineered cutter placement profile may include cutters exhibiting differing degrees of aggressiveness positioned in order to maximize rate-of-penetration and minimize torque-on-bit while maintaining side cutting capability and steerability.
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Search Report under Section 17, Application No. GB 9802375.7, Jul. 15, 1998, 1 page.
Beuershausen Christopher C.
Dykstra Mark W.
Fincher Roger
Illerhaus Roland
Pessier Rudolf C. O.
Baker Hughes Incorporated
Singh Sunil
TraskBritt PC
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